Manual 2100-579A
Page 6 of 41
IMPORTANT
When a furnace is installed so that supply
ducts carry air circulated by the furnace to
areas outside the space containing the furnace,
the return air must also be handled by a duct(s)
sealed to the furnace casing and terminating
outside the space containing the furnace This
is to prevent drawing possible hazardous
combustion products into the circulated air.
INSTALLING THE FURNACE
INSTRUMENTS REQUIRED FOR PROPER
SETUP OF THE FURNACE
It is important that a set of instruments capable of the
following requirements be used for the setup of this
furnace to ensure proper and safe operation:
1. Oil pump pressure gauge that measures up to
200 PSI.
2. Smoke gun to pull smoke samples from flue.
3. Draft gauge that will measure -.02" water column
(W.C.)
4. Duct static pressure gauge 0-1.0" W.C. range.
5. Temperature gauge that can read from 50° F up to
700° F.
6. A gauge to measure CO
2
or O
2
.
INSTALLATION
A typical installation is shown in Figures 2 and 3. All
parts of the furnace installation (furnace, oil tank and
piping systems, combustion and ventilation air, venting,
etc.) must comply with NFPA31, Installation of Oil
Burning Equipment -- latest edition. This drawing
shows the typical connecting parts needed to correctly
install this furnace. Make sure that all parts of the
heating system comply with the local codes.
Check the furnace and your load calculation to verify
that the unit is properly sized. (Refer to “Equipment
Selection” section on Page 4.)
The correct size of unit needed may be substantially
smaller than the unit being replaced due to home
improvements and technology advancements since the
initial installation.
INADEQUATE SUPPLY AIR and/or RETURN
AIR DUCT SYSTEMS
Short cycling because of limit control operation can be
created by incorrectly designed or installed supply and/
or return air duct systems.
The duct systems must be designed using ASHRAE
or ACCA design manuals and the equipment CFM
and external static pressure ratings to insure proper air
delivery capabilities.
On replacement installations, particularly if
equipment is oversized, the duct systems can easily be
undersized. Modifications may be required to assure
that the equipment is
operating within the approved
temperature rise range when under full rated input
conditions
, and that no short cycling on limit controls
is occurring.
DUCT WORK
The air distribution system should be designed and
installed in conformance with manuals published by Air
Conditioning Contractors of America (ACCA) as set
forth in Manual D, or ASHRAE publications.
INSTALLING A COOLING UNIT
When the furnace is used in connection with a cooling
unit
*
, the furnace shall be installed parallel with or on the
upstream side of the cooling unit to avoid condensation
in the heating element. With a parallel flow arrangement,
the dampers or other means used to control flow of air
shall be adequate to prevent chilled air from entering
the furnace, and if manually operated, must be equipped
with means to prevent operation of either unit, unless the
damper is in the full heat or cool position.
* A cooling unit is an air conditioning coil, heat pump
coil or chilled water coil.
When installing a cooling unit above an FL series
furnace, the coil must be spaced far enough from the
furnace outlet to assure proper operation of the furnace.
Bard supplied coils, when used with Bard supplied coil
cabinets, are automatically positioned.
For top discharge FL models, when coils are installed
without using Bard coil cabinets or coils of another
brand are used, the coil drain pan should be located a
minimum of six (6) inches above the top of the furnace
cabinet. If a greater clearance is specified by the coil
manufacturer then it would apply.
Bard offers two (2) evaporator coil support accessories
specifically designed for use with Bard oil furnaces.
Accessory CSADP2220 is for use with all top discharge
furnaces except for the 130,000 and 140,000 BTUH
(large cabinet) models. CSADP2520 is required for the
large cabinet furnaces.
NOTE: IF DRAIN PAN IS ANYTHING OTHER
THAN A STEEL PAN PARTICULAR
ATTENTION MUST BE GIVEN TO
THE INSTALLATION INSTRUCTIONS
FOR THE COIL TO MAKE SURE IT IS
ACCEPTABLE FOR USE WITH THESE
OIL FURNACES HAVING MAXIMUM
OUTLET AIR TEMPERATURE OF 200° F.
